RHSA-2026:14873 - Security Advisory

Topic

A new release is now available for Red Hat Satellite 6.17 for RHEL 9.

Description

Red Hat Satellite is a system management solution that allows organizations
to configure and maintain their systems without the necessity to provide
public Internet access to their servers or other client systems. It
performs provisioning and configuration management of predefined standard
operating environments.

Security Fix(es):

• python-pillow: Pillow: Out-of-bounds Write via Specially Crafted PSD Image (CVE-2026-25990)
• candlepin: mchange-commons-java: Arbitrary code execution via JNDI dereferencing of crafted objects (CVE-2026-27727)
• python-markdown: denial of service via malformed HTML-like sequences (CVE-2025-69534)
• python-pyOpenSSL: DTLS cookie callback buffer overflow (CVE-2026-27459)
• rubygem-activesupport: Active Support: Denial of Service via large scientific notation strings (CVE-2026-33176)

Bug Fix(es):

• Satellite manifest consumer profile cert and key found in satellite client rhsm cache (SAT-43920)
• All communication should happen only over https during global registration execution (SAT-43921)
• Impossible to generate registration command via REST API in isolated networks managed by external capsules (SAT-43922)
• Errata applicability and Refresh applicability tasks for RHEL 7 hosts runs dnf command. (SAT-43923)
• BIOS info is not populated in All hosts page and in Host Details tab (SAT-43925)
• Executing the 'katello::clean_backend_objects' rake task takes a long time to complete (SAT-43926)
• Puppet fact parser can't create OS entry blocking Satellite leapp upgrades (SAT-43928)
• No repositories available through subscriptions on a cloud-instance host after registering it to Red Hat Satellite using global registration method (SAT-43929)
• Proxy password shown in clear text in the Overview page of Virt-who Configuration (SAT-43931)
• Non-admin users on Satellite with viewer role, unable to see the hostgroup. (SAT-44039)

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For detailed instructions how to apply this update, refer to:

https://docs.redhat.com/en/documentation/red_hat_satellite/6.17/html/updating_red_hat_satellite/index

Affected Products

• Red Hat Satellite 6.17 x86_64
• Red Hat Satellite Capsule 6.17 x86_64
• Red Hat Enterprise Linux for x86_64 9 x86_64

Fixes

• BZ - 2439170 - CVE-2026-25990 pillow: Pillow: Out-of-bounds Write via Specially Crafted PSD Image
• BZ - 2442671 - CVE-2026-27727 com.mchange/mchange-commons-java: mchange-commons-java: Arbitrary code execution via JNDI dereferencing of crafted objects
• BZ - 2444839 - CVE-2025-69534 python-markdown: denial of service via malformed HTML-like sequences
• BZ - 2448503 - CVE-2026-27459 pyOpenSSL: DTLS cookie callback buffer overflow
• BZ - 2450551 - CVE-2026-33176 Rails: Active Support: Active Support: Denial of Service via large scientific notation strings
• SAT-43920 - Satellite manifest consumer profile cert and key found in satellite client rhsm cache [rhn_satellite_6.17]
• SAT-43921 - All communication should happen only over https during global registration execution [rhn_satellite_6.17]
• SAT-43922 - Impossible to generate registration command via REST API in isolated networks managed by external capsules [rhn_satellite_6.17]
• SAT-43923 - Errata applicability and Refresh applicability tasks for RHEL 7 hosts runs dnf command. [rhn_satellite_6.17]
• SAT-43925 - BIOS info is not populated in All hosts page and in Host Details tab [rhn_satellite_6.17]
• SAT-43926 - Executing the 'katello::clean_backend_objects' rake task takes a long time to complete [rhn_satellite_6.17]
• SAT-43928 - Puppet fact parser can't create OS entry blocking Satellite leapp upgrades [rhn_satellite_6.17]
• SAT-43929 - No repositories available through subscriptions on a cloud-instance host after registering it to Red Hat Satellite using global registration method [rhn_satellite_6.17]
• SAT-43931 - Proxy password shown in clear text in the Overview page of Virt-who Configuration [rhn_satellite_6.17]
• SAT-44039 - Non-admin users on Satellite with viewer role, unable to see the hostgroup. [rhn_satellite_6.17]

CVEs

• CVE-2025-69534
• CVE-2026-25990
• CVE-2026-27459
• CVE-2026-27727
• CVE-2026-33176

References

• https://access.redhat.com/security/updates/classification/#important